Which tense do you use the word 'yet' in?

Hi everybody,

I don't exactly understand when I should use 'yet' in present simple (instead of present perfect). I think of a particular usage of this word. I give some examples (maybe these are wrong):

1. Do you know how to play handball yet? (= Did you learn the rules of this game?).
2. - Are you ready yet?
- No, I'm not. Be patient with me (e.g. I have many things to pack, I will move soon.).
3. Are you aware of the rules of handball yet?

I just wouldn't use present perfect in these sentences because it would sound strange. I couldn't explain the grammatical reasons. If I used the first sentence in a formal way (I call it 'formal'. Maybe it isn't. I really don't know.) then I would use present perfect. Um, it would be something like:

Have you acquainted yourself with the rules of handball yet?
(Maybe I would use past simple in the case of US English [based on an OALD description])
(Now the verb is also a formal one [based on OALD dictionary], but I just thought of the sound of the sentence).

Please explain me when I should use 'yet' in present simple (let's consider this usage) instead of present perfect.

Thanks for your help in advance.